BUS CONVERTER
EUS15-120 Model
Features:
48 Vin, Isolated, 4:1 Fixed Conversion Ratio
220 Watt Nominal Output (at 48 Vin, 55 C, 200 LFM)
170 Watt Output (at 38 Vin, 55 C, 200 LFM)
Industry Standard 1/8 Brick Footprint
Remote Enable (Primary Side, Positive or Negative)
Over-temperature and Over Current Protection
Direct Parallel Operation for Higher Power Applications
RoHS Compliant
Table 1
Input Characteristics Notes & Conditions (1) Min Typ. Max Units
Input Voltage Operating Range 36 48 55 Vdc
Input Voltage Absolute Maximum 60 Vdc
Turn-on Threshold 36 37.5 Vdc
Input Undervoltage Lockout Turn-off Threshold 34 35.5 Vdc
Hysteresis Voltage 2 Vdc
Turn-on Threshold 56 58 Vdc
Input Overvoltage Lockout Turn-off Threshold 55 57 Vdc
Hysteresis Voltage 2 Vdc
Maximum Input Current Steady-State (23 A out) 5.5 Adc
No-Load Input Current Enabled state, on load (48 Vin) 80 mA
Disabled Input Current Disabled state (48 Vin) 6 mA
Input Reflected Ripple Current 50 mA p-p
Inrush Current Transient 0.2 A2s
Enable  Negative Logic Version On State range -0.1 0.8 Vdc
Internal 10 K pull-up to 5 V. Off State range 2.4 5.0 Vdc
Enable  Positive Logic Version On State range 2.4 5.0 Vdc
Internal 100 K pull-down to GND. Off State range -0.1 0.8 Vdc
Table 2
Output Characteristics Notes & Conditions (1) Min Typ. Max Units
Output Voltage Set Point (Vo=Vin/4 +0/-0.5%) Vin = 48.0 V, Io = 0 A 11.94 11.98 12.0 Vdc
Output Load Regulation Io = 0 to 15 A 0.7 V
Output Voltage Total Regulation Vin = 36 to 55 V, Io = 0 to 15 A, 8.3 13.75 Vdc
Vin = 42 to 53 V, Io = 0 to 15 A, 9.7 13.25 Vdc
Output Ripple Voltage & Noise 20 MHz Bandwidth 90 150 mV p-p
Output Current Operating Range 0 15 A
Efficiency Vin = 48 V, Io = 15 A 96 %
Turn-On Time Vin present: Enable to 90% Vout 10 mS
Start-up Inhibit Time Enabled: Vin applied to 90% Vout 80 mS
Transient Response (3) 25% step, 0.1A/źs, "Vo 160 mV
Recovery Time 100 źs
Maximum Output Capacitance (4) 3000 źF
Technical enquiries email: [e-mail], tel: [phone]
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BUS CONVERTER
EUS15-120 Model
Table 1
Protection Characteristics Notes & Conditions (1) Min Typ. Max Units
Output Over-Current Shutdown Non-Latching 21 23 25 A
Re-start rate TBD msec
Short Circuit Current Peak TBD Ap
Over Temperature Shutdown (5) Non-Latching 125 130 °C
Over Temperature Restart Hysteresis 10 °C
Table 2
General Specifications Notes & Conditions (1) Min Typ. Max Units
Isolation Voltage Input to Output 2250 Vdc
Isolation Resistance Input to Output 10 Mohm
Storage Temperature Range Non-condensing -40 125 °C
Operating Temperature Range Ambient (7) -40 100 °C
Thermal Measurement Location Temperature (7) See mechanical drawing for location 120 °C
Material Flammability UL 94V-0
MTBF Calculated (Bellcore TR-332) 1 TBD x106 Hrs
Demonstrated TBD x106 Hrs
2.28 L x 0.9 W x 0.48 H (max)
Dimension
(57.9L x 22.9W x 12.19H mm max)
Weight grams
Table 3
Standards Compliance Notes & Conditions (6)
UL/CSA 60950 Basic Insulation
EN60950 Certified by TUV
Notes:
(1) Vin = 48Vdc, Ta = 25 °C, Airflow = 200 LFM for all data unless otherwise noted.
(2) Output ripple voltage and noise is specified when measured with no external capacitance.
(3) Transient response is specified without a capacitor at the output of the converter.
(4) Product operates with an external capacitance greater than specified. For higher values please contact a Celestica representative.
(5) Thermal shutdown is monitored at the Thermal Measurement Location (TML). See  Mechanical Information on page 3 for TML location.
(6) See  Safety Considerations shown on last page.
(7) De-rating curves are conducted in a controlled environment. End application testing is required to ensure the Thermal Measurement Location
temperature is below the maximum specified.
(8) Recommended airflow direction is from pin 1 to pin 3, or 3 to 1 (transverse airflow).
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BUS CONVERTER
EUS15-120 Model
Mechanical Information
Figure 1
Pin Assignment
Table 4
Pin # Pin Name Function Notes & Conditions
1 Vi(+) Positive Input Voltage
Referenced to Vi(-).
2 En Input Enable / Disable Positive Logic: Floating = Enabled
Negative Logic: Floating = Disabled
3 Vi(-) Negative Input Voltage
4 Vo(-) Negative Output Voltage
5 Vo(+) Positive Output Voltage
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BUS CONVERTER
EUS15-120 Model
Efficiency Curves
Efficiency (%) vs. Iout (A) and Vin (V)
97%
96%
95%
94%
93%
92%
55Vin
91%
48Vin
90%
42Vin
89%
38Vin
88%
0 2 4 6 8 10 12 14 16 18 20
Figure 2
Output Voltage vs. Current
Vo (V) vs. Io (A) and Vin (V)
14
13
12
11
10
9
55 Vin
8
48 Vin
42 Vin
7
38 Vin
6
0 2 4 6 8 10 12 14 16 18 20
Figure 3
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BUS CONVERTER
EUS15-120 Model
Thermal Derating Curves (Transverse) TTML=120C Airflow from pin 3 to pin 1
Iout (A) vs. Tamb (C) and Air Flow (LFM) Iout (A) vs. Tamb (C) and Air Flow (LFM)
38 Vin 42 Vin
24
24
22
22
20
20
18
18
16
16
14
14
12
12
100 LFM
10 100 LFM
10
8 8
200 LFM 200 LFM
6 6
300 LFM
300 LFM
4 4
400 LFM
2 400 LFM
2
0 0
25 35 45 55 65 75 85 25 35 45 55 65 75 85
Figure 4
Figure 5
Iout (A) vs. Tamb (C) and Air Flow (LFM)
Iout (A) vs. Tamb (C) and Air Flow (LFM)
55 Vin
48 Vin
24
24
22
22
20
20
18
18
16
16
14
14
12
12
10 100 LFM
100 LFM
10
8
8
200 LFM
200 LFM
6
6
300 LFM
300 LFM
4
4
400 LFM
400 LFM
2
2
0
0
25 35 45 55 65 75 85
25 35 45 55 65 75 85
Figure 6 Figure 7
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BUS CONVERTER
EUS15-120 Model
Pout (W) vs. Tamb (C) and Vin (V)
200 LFM
275
250
225
200
175
150
125
38 Vin
100
42 Vin
75
48 Vin
50
25
55 Vin
0
25 35 45 55 65 75 85
Figure 8
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BUS CONVERTER
EUS15-120 Model
Turn-on from Vin (Enable On) Turn-on from Enable (Vin present)
Figure 9 Ch3: En; Ch2: Vout Figure 10 Ch3: Vin; Ch2: Vout
Vin=48V, Io=15A, Co=3000uF Vin=48V, Io=15A, Co=3000uF
Output Ripple/Noise
Figure 11 Vin=48V, Io=15A
Vripple = 114 mVpp
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BUS CONVERTER
EUS15-120 Model
Safety Considerations
The EUS series of converters are certified to the standards listed in the  Standards Compliance section in the table above. If this product is built into information
technology equipment, the installation must comply with the above standard.
An external input fuse (10 A recommended), must be used to meet the above requirements.
The output of the converter [Vo(+)/Vo(-)] is considered to remain within SELV limits when the input to the converter meets SELV or TNV-2 requirements.
The converters and materials meet UL 94V-0 flammability ratings.
Figure 12
Ordering Information